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Add support for TTML Regions extent

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This allows limiting the horizontal extension of the cues.
NOTE: So far, we only support percentages for size magnitudes.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=121682404
This commit is contained in:
olly 2016-05-06 09:44:42 -07:00 committed by Oliver Woodman
parent 642b2009f3
commit 99c0ba005a
5 changed files with 47 additions and 18 deletions
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2
library/src/androidTest/assets/ttml/multiple_regions.xml
View file

@ -8,7 +8,7 @@
<layout>
<region xml:id="region1" ttm:origin="10% 10%" extent="20% 20%"/>
<region xml:id="region2" ttm:origin="40% 40%" extent="20% 20%"/>
<region xml:id="region3" ttm:origin="10% 80%" extent="10% 10%"/>
<region xml:id="region3" ttm:origin="10% 80%"/>
<region xml:id="region4" ttm:origin="60% 10%" extent="20% 20%"/>
<region xml:id="ultimate" ttm:origin="45% 45%" extent="35% 35%"/>
</layout>

6
library/src/androidTest/java/com/google/android/exoplayer/text/ttml/TtmlParserTest.java
View file

@ -156,10 +156,13 @@ public final class TtmlParserTest extends InstrumentationTestCase {
assertEquals("lorem", ttmlCue.text.toString());
assertEquals(10.f / 100.f, ttmlCue.position);
assertEquals(10.f / 100.f, ttmlCue.line);
assertEquals(20.f / 100.f, ttmlCue.size);
ttmlCue = output.get(1);
assertEquals("amet", ttmlCue.text.toString());
assertEquals(60.f / 100.f, ttmlCue.position);
assertEquals(10.f / 100.f, ttmlCue.line);
assertEquals(20.f / 100.f, ttmlCue.size);
output = subtitle.getCues(5000000);
assertEquals(1, output.size());
@ -167,6 +170,7 @@ public final class TtmlParserTest extends InstrumentationTestCase {
assertEquals("ipsum", ttmlCue.text.toString());
assertEquals(40.f / 100.f, ttmlCue.position);
assertEquals(40.f / 100.f, ttmlCue.line);
assertEquals(20.f / 100.f, ttmlCue.size);
output = subtitle.getCues(9000000);
assertEquals(1, output.size());
@ -174,6 +178,7 @@ public final class TtmlParserTest extends InstrumentationTestCase {
assertEquals("dolor", ttmlCue.text.toString());
assertEquals(10.f / 100.f, ttmlCue.position);
assertEquals(80.f / 100.f, ttmlCue.line);
assertEquals(Cue.DIMEN_UNSET, ttmlCue.size);
output = subtitle.getCues(21000000);
assertEquals(1, output.size());
@ -181,6 +186,7 @@ public final class TtmlParserTest extends InstrumentationTestCase {
assertEquals("She first said this", ttmlCue.text.toString());
assertEquals(45.f / 100.f, ttmlCue.position);
assertEquals(45.f / 100.f, ttmlCue.line);
assertEquals(35.f / 100.f, ttmlCue.size);
output = subtitle.getCues(25000000);
ttmlCue = output.get(0);
assertEquals("She first said this\nThen this", ttmlCue.text.toString());

3
library/src/main/java/com/google/android/exoplayer/text/ttml/TtmlNode.java
View file

@ -53,6 +53,7 @@ import java.util.TreeSet;
public static final String ANONYMOUS_REGION_ID = "";
public static final String ATTR_ID = "id";
public static final String ATTR_TTS_BACKGROUND_COLOR = "backgroundColor";
public static final String ATTR_TTS_EXTENT = "extent";
public static final String ATTR_TTS_FONT_STYLE = "fontStyle";
public static final String ATTR_TTS_FONT_SIZE = "fontSize";
public static final String ATTR_TTS_FONT_FAMILY = "fontFamily";
@ -180,7 +181,7 @@ import java.util.TreeSet;
for (Entry<String, SpannableStringBuilder> entry : regionOutputs.entrySet()) {
TtmlRegion region = regionMap.get(entry.getKey());
cues.add(new Cue(cleanUpText(entry.getValue()), null, region.line, Cue.TYPE_UNSET,
Cue.TYPE_UNSET, region.position, Cue.TYPE_UNSET, Cue.DIMEN_UNSET));
Cue.TYPE_UNSET, region.position, Cue.TYPE_UNSET, region.width));
}
return cues;
}

48
library/src/main/java/com/google/android/exoplayer/text/ttml/TtmlParser.java
View file

@ -17,6 +17,7 @@ package com.google.android.exoplayer.text.ttml;
import com.google.android.exoplayer.C;
import com.google.android.exoplayer.ParserException;
import com.google.android.exoplayer.text.Cue;
import com.google.android.exoplayer.text.SimpleSubtitleParser;
import com.google.android.exoplayer.util.ColorParser;
import com.google.android.exoplayer.util.ParserUtil;
@ -74,9 +75,8 @@ public final class TtmlParser extends SimpleSubtitleParser {
+ "(?:(\\.[0-9]+)|:([0-9][0-9])(?:\\.([0-9]+))?)?$");
private static final Pattern OFFSET_TIME =
Pattern.compile("^([0-9]+(?:\\.[0-9]+)?)(h|m|s|ms|f|t)$");
private static final Pattern FONT_SIZE =
Pattern.compile("^(([0-9]*.)?[0-9]+)(px|em|%)$");
private static final Pattern ORIGIN_COORDINATES =
private static final Pattern FONT_SIZE = Pattern.compile("^(([0-9]*.)?[0-9]+)(px|em|%)$");
private static final Pattern PERCENTAGE_COORDINATES =
Pattern.compile("^(\\d+\\.?\\d*?)% (\\d+\\.?\\d*?)%$");
// TODO: read and apply the following attributes if specified.
@ -183,23 +183,42 @@ public final class TtmlParser extends SimpleSubtitleParser {
return globalStyles;
}
/**
* Parses a region declaration. Supports origin and extent definition but only when defined in
* terms of percentage of the viewport. Regions that do not correctly declare origin are ignored.
*/
private Pair<String, TtmlRegion> parseRegionAttributes(XmlPullParser xmlParser) {
String regionId = ParserUtil.getAttributeValue(xmlParser, TtmlNode.ATTR_ID);
String regionOrigin = ParserUtil.getAttributeValue(xmlParser, TtmlNode.ATTR_TTS_ORIGIN);
String regionExtent = ParserUtil.getAttributeValue(xmlParser, TtmlNode.ATTR_TTS_EXTENT);
if (regionOrigin == null || regionId == null) {
return null;
}
Matcher originMatcher = ORIGIN_COORDINATES.matcher(regionOrigin);
float position = Cue.DIMEN_UNSET;
float line = Cue.DIMEN_UNSET;
Matcher originMatcher = PERCENTAGE_COORDINATES.matcher(regionOrigin);
if (originMatcher.matches()) {
try {
float position = Float.parseFloat(originMatcher.group(1)) / 100.f;
float line = Float.parseFloat(originMatcher.group(2)) / 100.f;
return new Pair<>(regionId, new TtmlRegion(position, line));
position = Float.parseFloat(originMatcher.group(1)) / 100.f;
line = Float.parseFloat(originMatcher.group(2)) / 100.f;
} catch (NumberFormatException e) {
Log.w(TAG, "Ignoring malformed region declaration: '" + regionOrigin + "'", e);
Log.w(TAG, "Ignoring region with malformed origin: '" + regionOrigin + "'", e);
position = Cue.DIMEN_UNSET;
}
}
return null;
float width = Cue.DIMEN_UNSET;
if (regionExtent != null) {
Matcher extentMatcher = PERCENTAGE_COORDINATES.matcher(regionExtent);
if (extentMatcher.matches()) {
try {
width = Float.parseFloat(extentMatcher.group(1)) / 100.f;
} catch (NumberFormatException e) {
Log.w(TAG, "Ignoring malformed region extent: '" + regionExtent + "'", e);
}
}
}
return position != Cue.DIMEN_UNSET ? new Pair<>(regionId, new TtmlRegion(position, line, width))
: null;
}
private String[] parseStyleIds(String parentStyleIds) {
@ -387,10 +406,11 @@ public final class TtmlParser extends SimpleSubtitleParser {
matcher = FONT_SIZE.matcher(expression);
} else if (expressions.length == 2){
matcher = FONT_SIZE.matcher(expressions[1]);
Log.w(TAG, "multiple values in fontSize attribute. Picking the second "
+ "value for vertical font size and ignoring the first.");
Log.w(TAG, "Multiple values in fontSize attribute. Picking the second value for vertical font"
+ " size and ignoring the first.");
} else {
throw new ParserException();
throw new ParserException("Invalid number of entries for fontSize: " + expressions.length
+ ".");
}
if (matcher.matches()) {
@ -406,11 +426,11 @@ public final class TtmlParser extends SimpleSubtitleParser {
out.setFontSizeUnit(TtmlStyle.FONT_SIZE_UNIT_PERCENT);
break;
default:
throw new ParserException();
throw new ParserException("Invalid unit for fontSize: '" + unit + "'.");
}
out.setFontSize(Float.valueOf(matcher.group(1)));
} else {
throw new ParserException();
throw new ParserException("Invalid expression for fontSize: '" + expression + "'.");
}
}

6
library/src/main/java/com/google/android/exoplayer/text/ttml/TtmlRegion.java
View file

@ -24,14 +24,16 @@ import com.google.android.exoplayer.text.Cue;
public final float position;
public final float line;
public final float width;
public TtmlRegion() {
this(Cue.DIMEN_UNSET, Cue.DIMEN_UNSET);
this(Cue.DIMEN_UNSET, Cue.DIMEN_UNSET, Cue.DIMEN_UNSET);
}
public TtmlRegion(float position, float line) {
public TtmlRegion(float position, float line, float width) {
this.position = position;
this.line = line;
this.width = width;
}
}